CN115159957B - Composition for producing coal-based solid waste porous ceramic, preparation method and application thereof - Google Patents

Composition for producing coal-based solid waste porous ceramic, preparation method and application thereof Download PDF

Info

Publication number
CN115159957B
CN115159957B CN202110357668.1A CN202110357668A CN115159957B CN 115159957 B CN115159957 B CN 115159957B CN 202110357668 A CN202110357668 A CN 202110357668A CN 115159957 B CN115159957 B CN 115159957B
Authority
CN
China
Prior art keywords
coal
composition
solid waste
based solid
porous ceramic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110357668.1A
Other languages
Chinese (zh)
Other versions
CN115159957A (en
Inventor
马宁
巩思宇
董阳
王�琦
卓锦德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Energy Investment Corp Ltd
National Institute of Clean and Low Carbon Energy
Original Assignee
China Energy Investment Corp Ltd
National Institute of Clean and Low Carbon Energy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Energy Investment Corp Ltd, National Institute of Clean and Low Carbon Energy filed Critical China Energy Investment Corp Ltd
Priority to CN202110357668.1A priority Critical patent/CN115159957B/en
Publication of CN115159957A publication Critical patent/CN115159957A/en
Application granted granted Critical
Publication of CN115159957B publication Critical patent/CN115159957B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/135—Combustion residues, e.g. fly ash, incineration waste
    • C04B33/1352—Fuel ashes, e.g. fly ash
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/1305—Organic additives
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/131—Inorganic additives
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/1315—Non-ceramic binders
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/1324—Recycled material, e.g. tile dust, stone waste, spent refractory material
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/1328—Waste materials; Refuse; Residues without additional clay
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/135—Combustion residues, e.g. fly ash, incineration waste
    • C04B33/1355—Incineration residues
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3281—Copper oxides, cuprates or oxide-forming salts thereof, e.g. CuO or Cu2O
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/95—Products characterised by their size, e.g. microceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes

Abstract

The invention relates to the technical field of porous ceramics, in particular to a composition for producing coal-based solid waste porous ceramics, a coal-based solid waste porous ceramic, a preparation method and application thereof. The invention adopts coal-based solid waste composition (fly ash and coal-based solid waste ingredients) with specific component content and auxiliary materials (binder composition, organic forming agent and plasticizer) with specific content, and cooperates with D50 of the coal-based solid waste composition, D50 of the binder composition and weight ratio of the coal-based solid waste composition and the binder composition, so that the prepared coal-based solid waste porous ceramic keeps the appearance of the fly ash, and the coal-based solid waste porous ceramic has better performance (higher porosity, higher bending strength and higher thermal shock resistance) and realizes the average pore diameter adjustability of the porous ceramic.

Description

Composition for producing coal-based solid waste porous ceramic, preparation method and application thereof
Technical Field
The invention relates to the technical field of porous ceramics, in particular to a composition for producing coal-based solid waste porous ceramics, a coal-based solid waste porous ceramic, a preparation method and application thereof.
Background
Fly ash is an industrial waste with abundant reserves, low cost and easy availability, and the main component is SiO 2 And Al 2 O 3 The content of the two components reaches more than 70 percent, which is similar to the clay component in the raw materials of the traditional ceramic. The industrial waste can reduce environmental pollution and develop and produce porous ceramics with low cost and high added value.
CN106747319a discloses a porous ceramic prepared from magnesium slag and fly ash and a preparation method thereof, belonging to the field of ceramic materials. The method comprises the steps of mixing magnesium slag, fly ash and quartz sand according to a proportion of 1:0.125-1.25: mixing and crushing the materials according to the weight ratio of 0.125-0.25, placing the uniformly mixed powder into a mould for compression molding, and sintering the powder to prepare the porous ceramic. However, the method is complex in process, the crushed powder is difficult to ensure high porosity, and besides, the utilization rate of the fly ash is low.
CN107115768A discloses a flue gas dehydration ceramic membrane using fly ash as main raw material and a preparation method thereof, the method comprises: preparation of the support: (1) batching: the main material is fly ash, and the proportion is more than 68%; the auxiliary materials are dextrin, high-viscosity carboxymethyl cellulose, glycerol and kaolin, and the proportion is less than 32%; (2) powder: dry grinding is carried out for 4 hours by adopting an vertical ball mill, so that uniform mixing of ingredients is ensured, and the particle size in aggregate is less than 100 meshes; (3) mixing: the water-material ratio is 0.25-0.28; (4) vacuum pugging: vacuum pugging is carried out on the mixed materials for 4-5 times, and then sealing and aging are carried out for 12 hours, so that the water is uniformly mixed; vacuum pugging is carried out for 2-3 times again, so that the blank is ensured to have certain strength and shaping; (5) molding. However, in the method, not only the kaolin is needed to be added, but also the ingredients are needed to be ground, and in addition, the kaolin is additionally added under the condition of adding the fly ash, so that the utilization rate of the fly ash is still limited.
Therefore, in the prior art, in the process of preparing the porous ceramic by taking the fly ash as the main raw material, the problems of low utilization rate of the fly ash, complex process and poor performance of the prepared porous ceramic, such as difficult regulation and control of the average pore diameter, low porosity, low bending resistance, poor thermal shock resistance and the like, exist.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, in the process of preparing porous ceramics by taking fly ash as a main raw material, the fly ash utilization rate is low, the process is complex, the prepared porous ceramics have poor performance (the average pore diameter is difficult to regulate and control, the porosity is low, the bending resistance is low, the thermal shock resistance is poor) and the like, and provides a composition for producing coal-based solid waste porous ceramics, the coal-based solid waste porous ceramics, a preparation method and application thereof, and the coal-based solid waste porous ceramics prepared by adopting the composition have the adjustable average pore diameter, and higher porosity, bending strength and thermal shock resistance.
In order to achieve the above object, a first aspect of the present invention provides a composition for producing a coal-based solid waste porous ceramic, the composition comprising: the coal-based solid waste composition comprises fly ash and coal-based solid waste ingredients, wherein the coal-based solid waste ingredients are selected from at least one of gangue powder, gasified slag and furnace bottom slag;
wherein, based on the total weight of the composition, the content of the coal-based solid waste composition is 60-80wt%, the content of the binding agent composition is 16-30wt%, the content of the organic forming agent is 3-7wt%, and the content of the plasticizer is 1-3wt%;
wherein the D50 of the coal-based solid waste composition is 3-35 mu m, the D50 of the binder composition is 1-20 mu m, and the weight ratio of the coal-based solid waste composition to the binder composition is 2-5:1.
preferably, the coal-based solid waste composition is present in an amount of 66.5 to 75.5wt%, the binder composition is present in an amount of 20 to 25wt%, the organic forming agent is present in an amount of 3.5 to 6wt%, and the plasticizer is present in an amount of 1 to 2.5wt%, based on the total weight of the composition.
Preferably, the composition consists of a coal-based solid waste composition, a binder composition, an organic forming agent, and a plasticizer.
The second aspect of the invention provides a method for preparing a porous ceramic of coal-based solid waste, comprising the steps of:
(1) Mixing the composition for producing the coal-based solid waste porous ceramic provided in the first aspect with water, and then molding;
(2) And drying and sintering the formed green body to obtain the coal-based solid waste porous ceramic.
In a third aspect, the invention provides a coal-based solid waste porous ceramic produced by the method provided in the second aspect.
Preferably, the coal-based solid waste porous ceramic has an average pore size of 0.5-5 μm, preferably 0.8-2.5 μm; the porosity is more than or equal to 40 percent, preferably 40 to 70 percent; the bending strength is more than or equal to 20MPa, preferably 30-100MPa; the thermal shock resistance is more than or equal to 300 ℃, preferably 400-800 ℃.
In a fourth aspect, the invention provides the use of the coal-based solid waste porous ceramic provided in the third aspect in flue gas dust removal, catalyst support, sewage treatment, sound absorption and water treatment.
Through the technical scheme, the coal-based solid waste composition (fly ash and coal-based solid waste ingredients) with specific component content and the auxiliary materials (binder composition, organic forming agent and plasticizer) with specific content are adopted, and the D50 of the coal-based solid waste composition, the D50 of the binder composition and the weight ratio of the coal-based solid waste composition to the binder composition are cooperated, so that the prepared coal-based solid waste porous ceramic keeps the appearance of the fly ash, the coal-based solid waste porous ceramic has better performance (higher porosity, higher bending strength and higher thermal shock resistance) and the average pore diameter of the porous ceramic is adjustable.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
FIG. 1 is a surface microscopic SEM image of a coal-based solid waste porous ceramic A1 prepared in example 1.
Detailed Description
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
In the present invention, unless explicitly stated, neither "first", "second" nor "third" represent a sequential order nor are they intended to be limiting of the respective materials or operations, only for distinguishing between the respective materials or operations, for example, "first", "second" and "third" in "first", "second" and "third" are only intended to distinguish between them.
In a first aspect the present invention provides a composition for producing a coal-based solid waste porous ceramic, the composition comprising: a coal-based solid waste composition, a binder composition, an organic forming agent, and a plasticizer; the coal-based solid waste composition comprises fly ash and coal-based solid waste ingredients, wherein the coal-based solid waste ingredients are selected from at least one of gangue powder, gasified slag and furnace bottom slag;
wherein, based on the total weight of the composition, the content of the coal-based solid waste composition is 60-80wt%, the content of the binding agent composition is 16-30wt%, the content of the organic forming agent is 3-7wt%, and the content of the plasticizer is 1-3wt%;
wherein the D50 of the coal-based solid waste composition is 3-35 mu m, the D50 of the binder composition is 1-20 mu m, and the weight ratio of the coal-based solid waste composition to the binder composition is 2-5:1.
the inventors of the present invention studied and found that: when the coal-based solid waste composition (fly ash and coal-based solid waste ingredients) with specific component content and the auxiliary materials (binder composition, organic forming agent and plasticizer) with specific content are adopted, and the D50 of the coal-based solid waste composition, the D50 of the binder composition and the weight ratio of the coal-based solid waste composition and the binder composition are cooperated, the coal-based solid waste porous ceramic is prepared without grinding, ball milling and other crushing processes on the coal-based solid waste composition and the auxiliary materials, and without adding an inorganic forming agent and a pore-forming agent, therefore, the invention can ensure that the prepared coal-based solid waste porous ceramic keeps the appearance of the fly ash under the conditions of reducing the complexity of the process and improving the utilization rate of the coal-based solid waste composition (without adding the inorganic forming agent), and the average pore diameter of the coal-based solid waste porous ceramic is adjustable within the range of 0.5-5 mu m, and meanwhile, the coal-based solid waste porous ceramic has higher porosity, higher bending strength and higher thermal shock resistance.
In the present invention, the composition is solid particles unless otherwise specified.
In the present invention, the amounts of the components or the amounts to be added may be set according to the amounts of the components in the composition, unless otherwise specified.
In the present invention, the D50 of the coal-based solid waste composition and the D50 of the binder composition are each independently measured by a laser particle sizer (malvern-MS-2000).
According to the present invention, it is preferable that the coal-based solid waste composition is contained in an amount of 66.5 to 75.5wt%, the binder composition is contained in an amount of 20 to 25wt%, the organic forming agent is contained in an amount of 3.5 to 6wt%, and the plasticizer is contained in an amount of 1 to 2.5wt%, based on the total weight of the composition. The adoption of the preferable content of each component is more beneficial to improving the comprehensive performance of the porous ceramic of the coal-based solid waste.
According to a preferred embodiment of the present invention, the composition consists of a coal-based solid waste composition containing fly ash and a coal-based solid waste ingredient selected from at least one of gangue powder, gasification slag and furnace bottom slag, a binder composition, an organic forming agent and a plasticizer;
wherein, based on the total weight of the composition, the content of the coal-based solid waste composition is 60-80wt%, the content of the binding agent composition is 16-30wt%, the content of the organic forming agent is 3-7wt%, and the content of the plasticizer is 1-3wt%;
wherein the D50 of the coal-based solid waste composition is 3-35 mu m, the D50 of the binder composition is 1-20 mu m, and the weight ratio of the coal-based solid waste composition to the binder composition is 2-5:1.
according to the invention, by cooperation of the D50 of the coal-based solid waste composition, the D50 of the binder composition, the weight ratio of the coal-based solid waste composition to the binder composition and the weight ratio of the components, the average pore diameter of the coal-based solid waste porous ceramic can be regulated and controlled within the range of 0.5-5 mu m under the condition that the coal-based solid waste porous ceramic has better performance.
According to a preferred embodiment of the invention, the D50 of the coal-based solid waste composition is from 5 to 10 μm, the D50 of the binder composition is from 3 to 5 μm, and the weight ratio of the coal-based solid waste composition to the binder composition is from 2.5 to 3:1, realizing the regulation and control of the average pore diameter of the coal-based solid waste porous ceramic within the range of 0.8-1.2 mu m.
According to a preferred embodiment of the invention, the D50 of the coal-based solid waste composition is 11-20 μm, the D50 of the binder composition is 6-10 μm, and the weight ratio of the coal-based solid waste composition to the binder composition is 3.1-3.5:1, realizing the regulation and control of the average pore diameter of the coal-based solid waste porous ceramic within the range of 1.3-2.2 mu m.
According to a preferred embodiment of the invention, the D50 of the coal-based solid waste composition is 21-30 μm, the D50 of the binder composition is 11-15 μm, and the weight ratio of the coal-based solid waste composition to the binder composition is 3.6-4:1, realizing the regulation and control of the average pore diameter of the coal-based solid waste porous ceramic within the range of 2.3-5 mu m.
In some embodiments of the invention, preferably, the weight ratio of fly ash to coal-based solid waste furnish is 50-80:20-50, preferably 60-70:30-40. The adoption of the preferable conditions is more beneficial to improving the comprehensive performance of the coal-based solid waste porous ceramic, in particular to the bending strength of the material, and the fly ash and the coal-based solid waste ingredients have higher bending strength under the condition of ensuring the porosity under the specific formula proportion.
In some embodiments of the present invention, preferably, the major component of the coal-based solid waste composition is Al 2 O 3 And SiO 2 。
According to the present invention, preferably, al is based on the total weight of the coal-based solid waste composition 2 O 3 The content of (2) is 30-60wt%, preferably 35-55wt%; siO (SiO) 2 The content of (C) is 25-55wt%, preferably 30-50wt%. The inventors of the present invention have studied and found that the use of Al 2 O 3 High content coal-based solid waste compositions, in particular Al 2 O 3 When the content of (C) is in the range of 35-55wt%, the porosity of the prepared coal-based solid waste porous ceramic can be further improved.
In the present invention, al in the coal-based solid waste composition 2 O 3 And SiO 2 The content of (2) is measured by an X-ray fluorescence spectrum analysis method.
In the present invention, the coal-based solid waste composition contains other unavoidable impurities, for example, K, in addition to the above-mentioned components 2 O、Na 2 O and P 2 O 5 Etc., and are not discussed in any great detail herein.
In the invention, the binder composition is capable of controlling the average pore size of the coal-based solid waste porous ceramic. Preferably, the binder composition comprises: al (Al) 2 O 3 、TiO 2 CuO and MgO. Further preferably, the binder composition is composed of Al 2 O 3 、TiO 2 CuO and MgO.
In some embodiments of the invention, preferably, al is present in the binder composition 2 O 3 The content of (2) is 5-15wt%, preferably 8-12wt%; tiO (titanium dioxide) 2 The content of (2) is 10-20wt%, preferably 14-18wt%; the content of CuO is 5-15wt%, preferably 8-12wt%; the MgO content is 50 to 75wt%, preferably 58 to 70wt%.
In the present invention, the organic molding agent is an organic compound having a viscosity in the range of 3000 to 200000mpa·s, and preferably the organic molding agent is at least one selected from the group consisting of methylcellulose, carboxymethylcellulose, hydroxypropyl methylcellulose, polyvinyl alcohol, and polyanionic cellulose, more preferably methylcellulose and/or carboxymethylcellulose. The viscosity of the methyl cellulose can be 5000-150000 mPa.s, the viscosity of the carboxymethyl cellulose can be 5000-150000 mPa.s, and the polyvinyl alcohol can be PVA-1799 and/or PVA-1788. In the invention, preferably, the performance index of the polyanionic cellulose meets the requirements of GBT 35928-2018 polyanionic cellulose.
In the present invention, the plasticizer is selected from the group consisting of glycerol, propylene glycol, raw tung oil, polyethylene glycol, castor oil, soybean oil, oleic acid and polyvinyl alcohol, more preferably glycerol and/or polyethylene glycol, and preferably is different from the organic forming agent.
The second aspect of the invention provides a method for preparing a porous ceramic of coal-based solid waste, comprising the steps of:
(1) Mixing the composition for producing coal-based solid waste porous ceramic provided in the first aspect with water, and then molding;
(2) And drying and sintering the formed green body to obtain the coal-based solid waste porous ceramic.
In the present invention, the mixing in step (1) is not particularly limited as long as each component contained in the composition for producing a coal-based solid waste porous ceramic is uniformly mixed with water. Preferably, the mixing in step (1) comprises:
a) First mixing the coal-based solid waste composition contained in the composition for producing the coal-based solid waste porous ceramic with an organic forming agent to obtain a mixture;
b) Secondly mixing water with a binding agent composition and a plasticizer contained in the composition for producing the coal-based solid waste porous ceramic to obtain a suspension;
c) And thirdly mixing the mixture and the suspension to obtain a mixture.
In the invention, the preferable mixing mode in the step (1) can ensure that the bonding agent composition is uniformly dispersed around the coal-based solid waste composition, so that the porous ceramic has higher thermal shock resistance and bending strength under the condition of ensuring high porosity performance.
In the present invention, the kinds and contents (weight) of the components in the composition for producing the coal-based solid waste porous ceramic are defined as above, and the present invention is not repeated.
According to the present invention, preferably, the weight ratio of fly ash to water contained in the coal-based solid waste composition is 1:0.15-0.65, preferably 1:0.2-0.4.
According to the invention, in particular, the method may further comprise: and (3) before the forming, sequentially ageing and pugging the mixture obtained by mixing the composition with water, and then forming.
In the present invention, the aging refers to a process of placing a mixture obtained by mixing a composition and water in a container for a period of time to disperse each component substance in the mixture more uniformly, and in the present invention, the aging conditions are not particularly limited, and may include: the temperature is 10-40 ℃ and the time is 24-72h.
In the invention, the condition of the mud is not particularly limited, and can be manual mud or mechanical vacuum mud, and the purpose of the mud is to uniformly mix the aged materials and ensure that no air exists in the aged materials.
In the present invention, the molding may be a conventional molding method, and may be press molding or extrusion molding.
In some embodiments of the present invention, preferably, the blank obtained by the molding is plate-shaped; further preferably, the blank has a plate shape with at least one channel.
According to the invention, preferably, the channel is arranged coaxially to the blank. When the number of channels is more than 2, it is preferable that the different channels are each parallel.
In the present invention, the plate shape preferably has a width of 60-1000mm, a thickness of 2-10mm, a wall thickness of 0.5-5mm, and a number of channels of 6-200.
In the present invention, the plate-like wall thickness refers to the minimum linear distance of the edge of the plate-like channel from the plate-like upper surface or lower surface, which refers to the surface parallel to the plate-like width direction.
In the present invention, the shape of the passage of the plate-like green body is not particularly limited, and may be changed according to the specific shape of the mold, for example, the cross section of the passage may be circular, triangular, square, or the like. According to a specific embodiment of the invention, the cross-sectional shape of the channel is circular, preferably the diameter of the circular shape is 0.2-40mm.
The fly ash-based porous ceramic green body prepared by the composition can have larger size and is not easy to bend.
According to a preferred embodiment of the invention, the plate-shaped porous ceramic filter plate is hollow, has a width of 60-1000mm, a thickness of 2-10mm, a wall thickness of 0.5-5mm and a number of pore channels of 6-200, the size of the blank corresponds to the size of the extrusion opening of the die used, and the size of the extrusion opening of the die is changed, so that the size of the blank is also changed.
In some embodiments of the present invention, preferably, the drying conditions include: the temperature is 80-150deg.C, preferably 90-120deg.C, and the time is 1-10 hr, preferably 2-8 hr.
In the present invention, the sintering conditions are not particularly limited, and preferably include: the temperature is 1200-1600 ℃, preferably 1400-1550 ℃; the time is 1-15h, preferably 1-5h; further preferably, the temperature is kept for 1 to 15 hours after the temperature is raised to 1200 to 1600 ℃ at a heating rate of 5 to 15 ℃/min. In particular, the composition is used for preparing the coal-based solid waste porous ceramic, which is beneficial to industrial production operation and high-porosity coal-based solid waste porous ceramic.
In a third aspect, the invention provides a coal-based solid waste porous ceramic produced by the method provided in the second aspect.
Preferably, the coal-based solid waste porous ceramic has an average pore size of 0.5-5 μm, preferably 0.8-2.5 μm; the porosity is more than or equal to 40 percent, preferably 40 to 70 percent; the bending strength is more than or equal to 20MPa, preferably 30-100MPa; the thermal shock resistance is more than or equal to 300 ℃, preferably 400-800 ℃.
In the invention, the average pore diameter parameter of the coal-based solid waste porous ceramic is measured by a bubble point and average flow method of a GB/T32361-2015 separation membrane pore diameter test method; the porosity parameter of the coal-based solid waste porous ceramic is measured by a GB/T1966-1996 porous ceramic volume weight and apparent porosity test method; the bending strength parameter of the coal-based solid waste porous ceramic is measured by a HYT 064-2002 tubular ceramic microporous filter membrane test method; the thermal shock resistance parameter of the coal-based solid waste porous ceramic is measured by a thermal shock resistance test method of GB-T16536-1996 engineering ceramic.
In a fourth aspect, the invention provides the use of the coal-based solid waste porous ceramic provided in the third aspect in flue gas dust removal, catalyst support, sewage treatment, sound absorption and water treatment.
The present invention will be described in detail by examples.
The D50 of the coal-based solid waste composition and the D50 of the binder composition were each independently measured by a laser particle sizer (malvern-MS-2000);
the average pore diameter parameter of the coal-based solid waste porous ceramic is measured by a bubble point and average flow method of a separation membrane pore diameter test method of GB/T32361-2015;
the porosity parameter of the coal-based solid waste porous ceramic is measured by a GB/T1966-1996 porous ceramic volume weight and apparent porosity test method;
the bending strength parameter of the coal-based solid waste porous ceramic is measured by a HYT 064-2002 tubular ceramic microporous filter membrane test method;
the thermal shock resistance parameter of the coal-based solid waste porous ceramic is measured by a thermal shock resistance test method of GB-T16536-1996 engineering ceramic.
Examples 1-7 and comparative examples 1-5 the amounts of the components in the compositions for producing the porous ceramics of the coal-based solid waste compositions are listed in Table 1;
the physical properties of the porous ceramics of the coal-based solid waste compositions prepared in examples 1 to 7 and comparative examples 1 to 5 are shown in Table 2.
Example 1
(1) First mixing a coal-based solid waste composition (D50 of 5 μm) with an organic forming agent (methylcellulose) to obtain a mixture; the binder composition (D50 of 3 μm, al 2 O 3 The content of (C) is 12wt%, tiO 2 The content of (2) is 18wt%, the content of CuO is 12wt%, the content of MgO is 58wt%, and the plasticizer (glycerol) is mixed with water for the second time to obtain suspension; thirdly mixing the mixture with the suspension to obtain a mixture;
wherein the coal-based solid waste composition is coal ash and gangue powder, and the weight ratio of the coal ash to the gangue powder is 70:30; al based on the total weight of the coal-based solid waste composition 2 O 3 The content of (C) is 55wt%, siO 2 The content of (2) is 40wt%;
the weight ratio of the coal-based solid waste composition to the binder composition was 2.8:1, a step of;
the weight ratio of the fly ash to the water is 1:0.2;
(2) Ageing the mixture obtained in the step (1) at 25 ℃ for 36 hours, mechanically and vacuum refining mud to obtain a wet blank mud section, and then placing the wet blank mud section into an extruder for extrusion molding to obtain a hollow plate-shaped blank body, wherein the width is 110mm, the thickness is 4mm, the wall thickness is 1mm, the number of pore channels is 35, and the following steps are the same;
(3) Drying the green body obtained in the step (2) for 4 hours at 100 ℃, then heating to 1500 ℃ at a heating rate of 5 ℃/min, and preserving heat for 10 hours to obtain coal-based solid waste porous ceramic A1;
the microscopic SEM image of the surface of the coal-based solid waste porous ceramic A1 is shown in fig. 1, and as can be seen from fig. 1, the coal-based solid waste porous ceramic A1 has the shape of fly ash.
Example 2
(1) First mixing a coal-based solid waste composition (D50 of 11 μm) with an organic forming agent (hydroxypropyl methylcellulose) to obtain a mixture; the binder composition (D50 of 6 μm, al 2 O 3 The content of (C) is 8wt%, tiO 2 The content of (2) is 14wt%, the content of CuO is 8wt%, the content of MgO is 70wt%, and the plasticizer (glycerol) is mixed with water for the second time to obtain a suspension; thirdly mixing the mixture with the suspension to obtain a mixture;
wherein the coal-based solid waste composition is coal ash and gasified slag, and the weight ratio of the coal ash to the gasified slag is 60:40; al based on the total weight of the coal-based solid waste composition 2 O 3 The content of (C) is 35wt%, siO 2 The content of (2) is 50wt%;
the weight ratio of the coal-based solid waste composition to the binder composition was 3.3:1, a step of;
the weight ratio of the fly ash to the water is 1:0.3;
(2) Ageing the mixture obtained in the step (1) at 25 ℃ for 36 hours, mechanically and vacuum refining mud to obtain a wet blank mud section, and then placing the wet blank mud section into an extruder for extrusion molding to obtain a hollow platy blank;
(3) Drying the blank obtained in the step (2) for 4 hours at 100 ℃, then heating to 1550 ℃ at a heating rate of 5 ℃/min, and preserving heat for 10 hours to obtain coal-based solid waste porous ceramic A2;
wherein the surface microscopic SEM image of the coal-based solid waste porous ceramic A2 is similar to fig. 1.
Example 3
(1) First mixing a coal-based solid waste composition (D50 of 30 μm) with an organic forming agent (hydroxypropyl methylcellulose) to obtain a mixture; the binder composition (D50 15 μm, al 2 O 3 The content of (C) is 8wt%, tiO 2 The content of (2) is 14wt%, the content of CuO is 8wt%, the content of MgO is 70wt%, and the plasticizer (raw tung oil) is mixed with water for the second time to obtain suspension; thirdly mixing the mixture with the suspension to obtain a mixture;
wherein the coal-based solid waste composition is coal ash and furnace bottom slag, and the weight ratio of the coal ash to the furnace bottom slag is 60:40; al based on the total weight of the coal-based solid waste composition 2 O 3 The content of (C) is 35wt%, siO 2 The content of (2) is 50wt%;
the weight ratio of the coal-based solid waste composition to the binder composition was 3.8:1, a step of;
the weight ratio of the fly ash to the water is 1:0.4;
(2) Ageing the mixture obtained in the step (1) at 25 ℃ for 36 hours, mechanically and vacuum refining mud to obtain a wet blank mud section, and then placing the wet blank mud section into an extruder for extrusion molding to obtain a hollow platy blank;
(3) Drying the blank obtained in the step (2) for 4 hours at 100 ℃, then heating to 1400 ℃ at a heating rate of 5 ℃/min, and preserving heat for 5 hours to obtain coal-based solid waste porous ceramic A3;
wherein the surface microscopic SEM image of the coal-based solid waste porous ceramic A3 is similar to fig. 1.
Example 4
The procedure of example 1 was followed except that the amounts of the respective components were appropriately adjusted, the amounts of the respective components in the composition were as shown in Table 1, and the remaining steps were the same, to obtain fly ash-based porous ceramic A4.
Wherein the surface microscopic SEM image of the coal-based solid waste porous ceramic A4 is similar to fig. 1.
Example 5
The procedure of example 1 was followed except that the D50 of the coal-based solid waste composition was replaced with 3 μm, and the remaining steps were the same, to obtain fly ash-based porous ceramic A5.
Wherein the surface microscopic SEM image of the coal-based solid waste porous ceramic A5 is similar to fig. 1.
Example 6
The procedure of example 1 was followed except that the weight ratio of the base solids waste composition to the binder composition was replaced with 5:1, properly adjusting the dosage of each component, wherein the dosage of each component in the composition is shown in table 1, and the rest steps are the same, so as to obtain the fly ash-based porous ceramic A6.
Wherein the surface microscopic SEM image of the coal-based solid waste porous ceramic A6 is similar to fig. 1.
Example 7
The procedure of example 1 was followed except that the coal-based solid waste composition, the binder composition, the organic forming agent, the plasticizer and water were directly mixed to obtain a mixture, and the remaining steps were the same to obtain fly ash-based porous ceramic A7.
Wherein the surface microscopic SEM image of the coal-based solid waste porous ceramic A7 is similar to fig. 1.
Comparative example 1
The procedure of example 1 was followed except that the amounts of the respective components were appropriately adjusted, the amounts of the respective components in the composition were as shown in Table 1, and the remaining steps were the same, to obtain a coal-based solid waste porous ceramic D1.
Comparative example 2
The procedure of example 1 was followed except that the organic molding agent was not added to the composition, the amounts of the respective components in the composition were appropriately adjusted, the amounts of the respective components in the composition were as shown in Table 1, and the remaining steps were the same, to obtain a coal-based solid waste porous ceramic D2.
Comparative example 3
The procedure of example 1 was followed except that the D50 of the coal-based solid waste composition was replaced with 40. Mu.m, and the remaining steps were the same, to obtain a coal-based solid waste porous ceramic D3.
Comparative example 4
The procedure of example 1 was followed except that the D50 of the binder composition was replaced with 25 μm, and the remaining steps were the same, to obtain a coal-based solid waste porous ceramic D4.
Comparative example 5
(1) Mixing fly ash (grinding to D50 of 10 mu m), a pore-forming agent (starch), an organic forming agent (methyl cellulose) and a plasticizer (kaolin) according to the weight ratio of 60:10:6:24 to obtain a mixture;
(2) Ageing the mixture obtained in the step (1) at 25 ℃ for 36 hours, mechanically and vacuum refining mud to obtain wet blank mud segments, and then placing the wet blank mud segments into an extruder for extrusion molding to obtain a hollow platy blank body with the width of 110mm, the thickness of 4mm, the wall thickness of 1mm and the number of pore channels of 35;
(3) And (3) drying the green body obtained in the step (2) for 4 hours at the temperature of 100 ℃, then heating to 1500 ℃ at the heating rate of 5 ℃/min, and preserving heat for 10 hours to obtain the coal-based solid waste porous ceramic D5.
TABLE 1
Note that: 1-weight ratio of coal-based solid waste composition, binder composition, organic forming agent and plasticizer; 2-refers to the weight ratio of the coal-based solid waste composition to the binder composition.
TABLE 2
Porous ceramics for coal-based solid waste A1 A2 A3 A4 A5 A6
Average pore size, μm 0.8 1.6 2.5 0.5 0.5 0.5
Porosity of% 45 55 60 45 42 40
Flexural Strength, MPa 43 52 60 43 38 43
Thermal shock resistance, DEG C 500 700 800 300 350 350
Continuous table 2
Porous ceramics for coal-based solid waste A7 D1 D2 D3 D4 D5
Average pore size, μm 4 0.3 6 7 6 10
Porosity of% 40 27 31 48 20 21
Flexural Strength, MPa 21 13 8 15 13 18
Thermal shock resistance, DEG C 300 200 200 200 200 200
As can be seen from the results of tables 1-2, the coal-based solid waste porous ceramics have higher porosity, flexural strength and thermal shock resistance by defining the weight ratio of the components, D50 of the coal-based solid waste combination, D50 of the binder composition, and the weight ratio of the coal-based solid waste composition and the binder composition, as compared to comparative examples 1-5; in particular, the comprehensive performance of the coal-based solid waste porous ceramic is further improved by limiting the weight ratio of each component, the D50 of the coal-based solid waste combination, the D50 of the binder composition and the weight ratio of the coal-based solid waste composition to the binder composition within a preferred protection range, and the average pore diameter of the coal-based solid waste porous ceramic is regulated and controlled within the range of 0.5-2.5 mu m.
As can be seen from comparing the data of example 1 and comparative example 5 in Table 2, the coal-based solid waste porous ceramic prepared by the method provided by the invention has better performance, namely, the coal-based solid waste porous ceramic prepared by the invention retains the appearance of fly ash, so that the average pore diameter of the coal-based solid waste porous ceramic can be regulated and controlled within the range of 0.5-5 mu m, and meanwhile, the coal-based solid waste porous ceramic has higher porosity, higher bending strength and higher thermal shock resistance.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the invention, all falling within the scope of protection of the invention.

Claims (19)

1. A composition for producing a coal-based solid waste porous ceramic, the composition comprising: the coal-based solid waste composition comprises fly ash and coal-based solid waste ingredients, wherein the coal-based solid waste ingredients are selected from at least one of gangue powder, gasified slag and furnace bottom slag;
wherein, based on the total weight of the composition, the content of the coal-based solid waste composition is 60-80wt%, the content of the binding agent composition is 16-30wt%, the content of the organic forming agent is 3-7wt%, and the content of the plasticizer is 1-3wt%;
wherein the D50 of the coal-based solid waste composition is 3-35 mu m, the D50 of the binder composition is 1-20 mu m, and the weight ratio of the coal-based solid waste composition to the binder composition is 2-5:1, a step of;
wherein the weight ratio of the fly ash to the coal-based solid waste ingredients is 50-80:20-50 parts;
wherein the main component of the coal-based solid waste composition is Al 2 O 3 And SiO 2 Al based on the total weight of the coal-based solid waste composition 2 O 3 The content of (2) is 30-60wt%; siO (SiO) 2 The content of (2) is 25-55wt%;
wherein the binder composition comprises: al (Al) 2 O 3 、TiO 2 CuO and MgO; al based on the total weight of the binder composition 2 O 3 The content of (2) is 5-15wt%; tiO (titanium dioxide) 2 The content of (2) is 10-20wt%; the content of CuO is 5-15wt%; the MgO content is 50-75wt%.
2. The composition of claim 1, wherein the coal-based solid waste composition is present in an amount of 66.5-75.5wt%, the binder composition is present in an amount of 20-25wt%, the organic forming agent is present in an amount of 3.5-6wt%, and the plasticizer is present in an amount of 1-2.5wt%, based on the total weight of the composition.
3. The composition of claim 2, wherein the composition consists of a coal-based solid waste composition, a binder composition, an organic shaping agent, and a plasticizer.
4. The composition of claim 1, wherein the D50 of the coal-based solid waste composition is 5-10 μιη, the D50 of the binder composition is 3-5 μιη, and the weight ratio of the coal-based solid waste composition to the binder composition is 2.5-3:1, a step of; or alternatively, the first and second heat exchangers may be,
the D50 of the coal-based solid waste composition is 11-20 mu m, the D50 of the binder composition is 6-10 mu m, and the weight ratio of the coal-based solid waste composition to the binder composition is 3.1-3.5:1, a step of; or alternatively, the first and second heat exchangers may be,
the D50 of the coal-based solid waste composition is 21-30 mu m, the D50 of the binder composition is 11-15 mu m, and the weight ratio of the coal-based solid waste composition to the binder composition is 3.6-4:1.
5. the composition of any of claims 1-4, wherein the weight ratio of fly ash to coal-based solid waste furnish is from 60 to 70:30-40.
6. The composition of claim 5, wherein Al is based on the total weight of the coal-based solid waste composition 2 O 3 The content of (2) is 35-55wt%; siO (SiO) 2 The content of (C) is 30-50wt%.
7. The composition of claim 1, wherein Al is based on the total weight of the binder composition 2 O 3 The content of (2) is 8-12wt%; tiO (titanium dioxide) 2 The content of (2) is 14-18wt%; the content of CuO is 8-12wt%; the MgO content is 58-70wt%.
8. The composition of any of claims 1-4, wherein the organic shaping agent is selected from at least one of methylcellulose, carboxymethylcellulose, hydroxypropyl methylcellulose, polyvinyl alcohol, and polyanionic cellulose.
9. The composition of claim 8, wherein the plasticizer is selected from at least one of glycerol, propylene glycol, raw tung oil, polyethylene glycol, castor oil, soybean oil, oleic acid, and polyvinyl alcohol.
10. A method for preparing coal-based solid waste porous ceramic, which is characterized by comprising the following steps:
(1) Mixing the composition for producing coal-based solid waste porous ceramics according to any one of claims 1 to 9 with water, and then molding;
(2) And drying and sintering the formed green body to obtain the coal-based solid waste porous ceramic.
11. The method of claim 10, wherein the mixing comprises:
a) First mixing the coal-based solid waste composition contained in the composition for producing the coal-based solid waste porous ceramic with an organic forming agent to obtain a mixture;
b) Secondly mixing water with a binding agent composition and a plasticizer contained in the composition for producing the coal-based solid waste porous ceramic to obtain a suspension;
c) And thirdly mixing the mixture and the suspension to obtain a mixture.
12. The method of claim 11, wherein the coal-based solid waste composition comprises a weight ratio of fly ash to water of 1:0.15-0.65.
13. The method of claim 11, wherein the coal-based solid waste composition comprises a weight ratio of fly ash to water of 1:0.2-0.4.
14. The method of claim 11, wherein the sintering conditions comprise: the temperature is 1200-1600 ℃; the time is 1-15h.
15. The method of claim 11, wherein the sintering conditions comprise: the temperature is 1400-1550 ℃; the time is 1-5h.
16. A coal-based solid waste porous ceramic produced by the method of any one of claims 10-15.
17. The coal-based solid waste porous ceramic of claim 16, wherein the coal-based solid waste porous ceramic has an average pore size of 0.5-5 μιη; the porosity is more than or equal to 40 percent; the bending strength is more than or equal to 20MPa; the thermal shock resistance is more than or equal to 300 ℃.
18. The coal-based solid waste porous ceramic of claim 16, wherein the coal-based solid waste porous ceramic has an average pore size of 0.8-2.5 μιη; the porosity is 40-70%; the bending strength is 30-100MPa; the thermal shock resistance is 400-800 ℃.
19. Use of the coal-based solid waste porous ceramic of any one of claims 16-18 in flue gas dust removal, catalyst support, sewage treatment, sound absorption and water treatment.
CN202110357668.1A 2021-04-01 2021-04-01 Composition for producing coal-based solid waste porous ceramic, preparation method and application thereof Active CN115159957B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110357668.1A CN115159957B (en) 2021-04-01 2021-04-01 Composition for producing coal-based solid waste porous ceramic, preparation method and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110357668.1A CN115159957B (en) 2021-04-01 2021-04-01 Composition for producing coal-based solid waste porous ceramic, preparation method and application thereof

Publications (2)

Publication Number Publication Date
CN115159957A CN115159957A (en) 2022-10-11
CN115159957B true CN115159957B (en) 2023-09-01

Family

ID=83475604

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110357668.1A Active CN115159957B (en) 2021-04-01 2021-04-01 Composition for producing coal-based solid waste porous ceramic, preparation method and application thereof

Country Status (1)

Country Link
CN (1) CN115159957B (en)

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917732A (en) * 1986-12-22 1990-04-17 Shell Oil Company Flyash treatment
JP2007176788A (en) * 2005-11-29 2007-07-12 Gako Imai Composition for porous ceramic, porous ceramic using the same and method for manufacturing the same
CN102260094A (en) * 2011-07-19 2011-11-30 武汉科技大学 Preparation method of diffuse type permeable material
JP2014024691A (en) * 2012-07-25 2014-02-06 Taisei Corp Cement composition, cement matrix, fiber-reinforced cement-based mixture, and cement admixture
WO2014073634A1 (en) * 2012-11-08 2014-05-15 株式会社柏木興産 Pozzolan admixture
WO2014132877A1 (en) * 2013-02-28 2014-09-04 小松精練株式会社 Porous ceramic sintered body and method for manufacturing same
CN104774023A (en) * 2015-03-31 2015-07-15 北京大学包头创新研究院 Lightweight ceramisite prepared from coal ashes and gasification slag as well as preparation method and application thereof
CN105130487A (en) * 2015-07-16 2015-12-09 神华集团有限责任公司 Composition for producing filter ceramic and the filter ceramic, and preparation method and application thereof
CN106747319A (en) * 2017-01-22 2017-05-31 北方民族大学 Standby porous ceramics of a kind of utilization magnesium slag, coal ash for manufacturing and preparation method thereof
CN107115768A (en) * 2017-04-25 2017-09-01 华北电力大学 A kind of fume-dehydrating ceramic film preparation method using flyash as primary raw material
CN107474820A (en) * 2017-09-28 2017-12-15 神华集团有限责任公司 Prepare fracturing propping agents composition and fracturing propping agents and preparation method thereof
CN107721392A (en) * 2017-09-28 2018-02-23 神华集团有限责任公司 Fracturing propping agents composition and fracturing propping agents and preparation method thereof
JP2018118895A (en) * 2017-01-26 2018-08-02 潤泰精密材料股▲分▼有限公司 Method for preparing porous material
CN110615689A (en) * 2019-10-24 2019-12-27 兖矿集团有限公司 Coal-based solid waste light high-strength ceramsite and preparation method thereof
CN110903097A (en) * 2019-12-11 2020-03-24 中钢集团洛阳耐火材料研究院有限公司 Preparation method of in-situ composite combined magnesia-alumina spinel-silicon carbide refractory material
WO2020109861A2 (en) * 2018-08-04 2020-06-04 Abbas Mohammad Khan Abbas A novel method of producing synthetic lightweight ceramic sand and uses thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010030560A2 (en) * 2008-09-09 2010-03-18 Ceramatec, Inc. Previous concrete comprising a geopolymerized pozzolanic ash binder

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917732A (en) * 1986-12-22 1990-04-17 Shell Oil Company Flyash treatment
JP2007176788A (en) * 2005-11-29 2007-07-12 Gako Imai Composition for porous ceramic, porous ceramic using the same and method for manufacturing the same
CN102260094A (en) * 2011-07-19 2011-11-30 武汉科技大学 Preparation method of diffuse type permeable material
JP2014024691A (en) * 2012-07-25 2014-02-06 Taisei Corp Cement composition, cement matrix, fiber-reinforced cement-based mixture, and cement admixture
WO2014073634A1 (en) * 2012-11-08 2014-05-15 株式会社柏木興産 Pozzolan admixture
WO2014132877A1 (en) * 2013-02-28 2014-09-04 小松精練株式会社 Porous ceramic sintered body and method for manufacturing same
CN104774023A (en) * 2015-03-31 2015-07-15 北京大学包头创新研究院 Lightweight ceramisite prepared from coal ashes and gasification slag as well as preparation method and application thereof
CN105130487A (en) * 2015-07-16 2015-12-09 神华集团有限责任公司 Composition for producing filter ceramic and the filter ceramic, and preparation method and application thereof
CN106747319A (en) * 2017-01-22 2017-05-31 北方民族大学 Standby porous ceramics of a kind of utilization magnesium slag, coal ash for manufacturing and preparation method thereof
JP2018118895A (en) * 2017-01-26 2018-08-02 潤泰精密材料股▲分▼有限公司 Method for preparing porous material
CN107115768A (en) * 2017-04-25 2017-09-01 华北电力大学 A kind of fume-dehydrating ceramic film preparation method using flyash as primary raw material
CN107474820A (en) * 2017-09-28 2017-12-15 神华集团有限责任公司 Prepare fracturing propping agents composition and fracturing propping agents and preparation method thereof
CN107721392A (en) * 2017-09-28 2018-02-23 神华集团有限责任公司 Fracturing propping agents composition and fracturing propping agents and preparation method thereof
WO2020109861A2 (en) * 2018-08-04 2020-06-04 Abbas Mohammad Khan Abbas A novel method of producing synthetic lightweight ceramic sand and uses thereof
CN110615689A (en) * 2019-10-24 2019-12-27 兖矿集团有限公司 Coal-based solid waste light high-strength ceramsite and preparation method thereof
CN110903097A (en) * 2019-12-11 2020-03-24 中钢集团洛阳耐火材料研究院有限公司 Preparation method of in-situ composite combined magnesia-alumina spinel-silicon carbide refractory material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
煤气化残渣基多孔陶瓷的制备研究;赵永彬;吴海骏;张学斌;刘洪刚;井云环;袁伟;;洁净煤技术(第05期);第10-14页 *

Also Published As

Publication number Publication date
CN115159957A (en) 2022-10-11

Similar Documents

Publication Publication Date Title
CN110256059B (en) High-flux ceramic flat membrane and preparation method thereof
CN101381241B (en) Porous breathable refractory materials for upper nozzle and production method thereof
CN104072141B (en) The preparation method of a kind of silicon carbide honeycomb ceramics
CN103553625B (en) Method for preparing silicon carbide micro powder for fine silicon carbide ceramics
CN111545078A (en) Flat ceramic membrane and preparation method thereof
CN109589912B (en) Concentrated rotating wheel adsorption material and preparation method thereof
CN107619281A (en) A kind of preparation method of low-temperature sintering acid and alkali-resistance porous silicon carbide ceramic supporter
CN103553705B (en) The coal gangue after removal of impurities is utilized to prepare the method for cordierite porous ceramics for raw material
CN113648848B (en) Hollow flat ceramic membrane and preparation method thereof
CN108658604A (en) A kind of preparation method of porous silicon carbide flat ceramic supporter
CN101537314A (en) Filter tube support body material for microporous inorganic separating film and synthesizing method thereof
CN104311098A (en) Method of preparing porous material by utilizing shell coal gasification fly ash
CN104072148A (en) Low-cost preparation method of silicon nitride honeycomb ceramics
CN115159957B (en) Composition for producing coal-based solid waste porous ceramic, preparation method and application thereof
CN100450968C (en) Method for preparing microporous mullite aerated head(plate) by fly ash
CN114105671B (en) Coal gangue-quartz-based ceramic support and preparation method thereof
EP2105421A1 (en) Porous ceramic
CN110885237A (en) Preparation method of low-temperature sintered alumina ceramic support
CN108373334B (en) 3D printing slurry based on waste ceramic recycling and preparation method of special binder thereof
CN1629101A (en) Method for preparing porous ceramic by polycrystalline Al#-[2]O#-[3] fiber preforming method
CN114133270B (en) Hollow flat plate ceramic filter membrane and preparation method thereof
CN112661492A (en) Composition for producing fly ash ceramic membrane, fly ash ceramic membrane and preparation method and application thereof
CN110317043B (en) Method for preparing shell porcelain by utilizing shells and shell porcelain
CN115180970B (en) Composition for producing fly ash-based porous ceramic, fly ash-based porous ceramic and preparation method and application thereof
CN113548871A (en) Fly ash composition, raw material for producing fly ash ceramic membrane, preparation method and application thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant